Residual forest biomass and energy assessment: a case study analysis in the region of Alto Minho (North Portugal) for the creation of BLCs and 2GBLCs

Alves, D.; Tabarés, José Luis Míguez; Rivo-López, Elena; Saavedra, Ángeles; Fariña, Maria E. A.; Alonso, Joaquim; Nunes, Leonel J. R.

doi:10.1080/14786451.2021.1899180

Cited by 4 publications

(3 citation statements)

References 48 publications

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“…It was also found that the chip produced had a low density when compared to the woodchips of Pinus pinaster or Eucalyptus globulus, which is usually around 450 kg m −3 , while that of C. striatus presented an average value of 190 kg m −3 [38,39]. It was proven that the material, which is made up of a high quantity of fines originated by the destruction of smaller woody parts, such as green leaves and stems, tended to aggregate in the presence of water, forming a paste.…”

Section: Methodsmentioning

confidence: 99%

Characterization of Cytisus striatus (Hill) Rothm.: Waste Biomass Energy Recovery as a Measure to Reduce the Risk of Rural Fires

Nunes¹

2021

Recycling

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Shrub species play a critical ecological role in ecosystems, covering significant areas. However, with the current development of vegetation cover, conditioned by climate change, certain species have acquired a dominant role, which suffocates the other ecosystem species in a natural monoculture model. Thus, some species, such as Cytisus striatus (Hill) Rothm., have acquired preponderance, mainly due to the dense forests they establish. This situation has contributed to the increased risk of rural fires, forcing permanent actions to control the settlements. These actions entail costs that make the continuity and permanence of control unsustainable. The energetic valorization of residual biomass resulting from operations to reduce fuel load is an option that seems viable, mainly if used in the production of biomass pellets in a mixture with other biomasses, such as Pinus pinaster or Eucalyptus globulus. The laboratory characterization tests demonstrated that the residual biomass of C. striatus presents parameters that fall within limits defined by the standard ENPlus®. The processing of this residual biomass on an industrial scale line is also feasible. However, given the configuration of the material to be processed, production lines may be necessary, especially concerning the detachment of the material. The logistical issue may also impose restrictions since the material has a low density, even when baled.

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Section: Methodsmentioning

confidence: 99%

Characterization of Cytisus striatus (Hill) Rothm.: Waste Biomass Energy Recovery as a Measure to Reduce the Risk of Rural Fires

Nunes¹

2021

Recycling

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“…This perspective can be counterbalanced through the creation of biomass logistic centers (BLCs), strategically distributed in order to optimize the collection processes, which allow the concentration of the quantities and types of biomass to be sent for recovery, or even by carrying out pre-processing operations, such as the destruction or drying of materials. Thus, according to Alves et al (2021), BLCs would be referred to as second-generation biomass logistic centers (2GBLCs), since the materials are subjected to processes where the added value is verified [38].…”

Section: Energy Recovery and Fires In Bush And Pasture Areasmentioning

confidence: 99%

Energy Recovery of Shrub Species as a Path to Reduce the Risk of Occurrence of Rural Fires: A Case Study in Serra da Estrela Natural Park (Portugal)

Nunes

Raposo

Meireles

et al. 2021

Fire

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The accumulation of biomass fuels resulting from the growth of heliophilous shrubs and small tree species at the edge of forests and on scrub and pasture lands contributes to the increased risk of rural fires in Mediterranean climate regions. This situation has been managed with a set of legislative measures launched with the objective of promoting cleaning and the control of these species. Areas of scrub and pasture already constitute the largest part of the annually burnt area in Portugal, resulting in high-intensity fires. In the present study, shrubs and small tree species were characterized in the laboratory. Thermogravimetric, chemical and calorimetric analyses for the evaluation of the potential for the energy recovery of the selected species were carried out. It was observed that energetic valorization (i.e., to enhance the value by planned actions) of these species is difficult because they present high levels of ash and metals, becoming prone to the occurrence of fouling and slagging phenomena. Thus, the creation of value chains that justify the incorporation of these materials becomes very difficult, except if used in non-certified, small-scale and locally based processes. The possibility of recovery through thermochemical conversion processes, such as torrefaction, pyrolysis or gasification, must be studied so that more efficient and feasible recovery alternatives can be found, allowing for the creation of value chains for these residual materials to promote their sustainable management and, thus, mitigate the risk of rural fires occurring.

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“…In the pursuit of sustainable energy solutions, the management of biomass parks has emerged as a critical area of focus [19]. This involves understanding the dynamics of biomass flow, storage, and utilization within these parks.…”

Section: Scenario Descriptionmentioning

confidence: 99%

Mathematical Modeling Approach to the Optimization of Biomass Storage Park Management

Nunes

2024

Systems

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This paper addresses the critical issue of managing biomass parks, a key component in the shift towards sustainable energy sources. The research problem centers on optimizing the management of these parks to enhance production and economic viability. Our aim was to bridge the gap in current research by developing and applying mathematical models tailored for biomass park management. The study commenced by constructing a basic model based on assumptions such as uniform biomass and steady input rates. Progressing from this initial model, we explored sophisticated control strategies, including Pontryagin’s maximum principle and dynamic programming, and employed numerical methods to tackle the nonlinearities and complexities inherent in biomass management. Our approach’s scope extended to predicting and managing biomass flow, highlighting each method’s distinct advantages. The simple model laid the groundwork for understanding, while optimal control techniques revealed the system’s intricate dynamics. The numerical methods provided practical solutions to complex equations. We found that while each method is beneficial on its own, their combined use can significantly improve decision-making in biomass park management. This research emphasizes the importance of aligning the chosen method with specific operational challenges and desired outcomes for optimal efficacy, offering both theoretical insights and practical applications in the field of renewable energy management.

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Residual forest biomass and energy assessment: a case study analysis in the region of Alto Minho (North Portugal) for the creation of BLCs and 2GBLCs

Cited by 4 publications

References 48 publications

Characterization of Cytisus striatus (Hill) Rothm.: Waste Biomass Energy Recovery as a Measure to Reduce the Risk of Rural Fires

Characterization of Cytisus striatus (Hill) Rothm.: Waste Biomass Energy Recovery as a Measure to Reduce the Risk of Rural Fires

Energy Recovery of Shrub Species as a Path to Reduce the Risk of Occurrence of Rural Fires: A Case Study in Serra da Estrela Natural Park (Portugal)

Mathematical Modeling Approach to the Optimization of Biomass Storage Park Management

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